239.06% is the change from 64 to 217
Calculation steps:
[( 217 - 64 ) ÷ 64] x 100 = 239.06%
Formula
Percentage change = [(217 - 64) / 64] x 100
Subtract the new number by the original number
217 - 64 = 153
153 ÷ 64 = 2.390625
2.390625 x 100 = 239.06%